Which of the following explains the effect of a whip crack ??
When you make a quick lane change or turn the steering wheel suddenly, the rear trailer tends to swing out. The force of the rear trailer is magnified, causing it to overturn.
The semi-trailer is full, and the cargo is loaded into the front of the trailer. When you make a sudden movement of the steering wheel, the load will tend to slide forcefully to the back of the trailer, forcing the trailer to overturn.
When you change lanes quickly or move the steering wheel suddenly, the tractor tends to shake and sway. The maximum speed of the trailer behind forces the tractor to turn over before the trailer.